Method for sequential determination of Fe-55 and Ni-63 in leaching solution from cement solidification

摘要

A method for sequential determination of Fe-55 and Ni-63 in leaching solution of cement solidification using liquid scintillation counting (LSC) was developed. In this method, Fe-55 and Ni-63 were first precipitated in the form of hydroxide and subsequently purified by anion exchange chromatography and dimethylglyoxime precipitation. After the purification, Fe-55 and Ni-63 were determined by LSC. The performance of the method was examined, and minimum detectable activity concentration was determined to be 0.82BqL(-1) for Fe-55 and 0.42BqL(-1) for Ni-63 in leaching solution samples with a counting time of 1h. High decontamination factors for Fe-55 and Ni-63 were also obtained.